diff --git a/src/level/doomdata.h b/src/level/doomdata.h
index a1adc19..725611c 100644
--- a/src/level/doomdata.h
+++ b/src/level/doomdata.h
@@ -454,7 +454,7 @@ struct FLevel
 	IntSector *GetBackSector(const IntSideDef *side);
 	IntSector *GetSectorFromSubSector(const MapSubsectorEx *sub);
 	MapSubsectorEx *PointInSubSector(const int x, const int y);
-	FloatVertex GetSegVertex(int index);
+	FloatVertex GetSegVertex(unsigned int index);
 
 	vec3 GetLightProbePosition(int index);
 
diff --git a/src/level/level_light.cpp b/src/level/level_light.cpp
index 02d8e9a..9e1326d 100644
--- a/src/level/level_light.cpp
+++ b/src/level/level_light.cpp
@@ -226,13 +226,8 @@ MapSubsectorEx *FLevel::PointInSubSector(const int x, const int y)
 	return &GLSubsectors[nodenum & ~NFX_SUBSECTOR];
 }
 
-FloatVertex FLevel::GetSegVertex(int index)
+FloatVertex FLevel::GetSegVertex(unsigned int index)
 {
-	if (index & 0x8000)
-	{
-		index = (index & 0x7FFF) + NumGLVertices;
-	}
-
 	FloatVertex v;
 	v.x = F(GLVertices[index].x);
 	v.y = F(GLVertices[index].y);